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Updated: May 28, 2026

Excitation-Scanning Hyperspectral Imaging Microscopy to Efficiently Discriminate Fluorescence Signals
Published on: August 22, 2019
Scanning electron microscope image enhancement using spread spectrum through dither signal imposition
Kwang Oh Jung1, Wonjong Joo, Dong Hwan Kim
1Graduate School of NID Fusion Technology, Seoul National University of Science and Technology, Seoul 139-743, South Korea.
Abstract:
Noise is a primary issue in obtaining an image in a scanning microscope. This noise needs to be minimized in order to have a clear image of the sample in case of a nanosize level measurement. In this work, we propose a method to improve the image quality by applying dither signal injection to the scanning signal. This method involves minimizing the noise that occurs in scan control circuits, which results in a blurry or distorted image. The collected secondary electrons are first multiplied through a photomultiplier tube and are then converted into digital form using an analog/digital (A/D) converter. We propose a solution for the noise from the scan control circuit that appears on the image by adopting the spread spectrum method.
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